title: 1-[4-(Di-methyl-amino)-benzyl-idene]-4-o-tolyl-thio-semicarbazide.
abstract: The asymmetric unit of the title compound, C17H20N4S, contains two independent mol-ecules, the main difference between them being the dihedral angles between the benzene rings [19.99 (17) and 9.72 (17)°]. The mol-ecules both have a trans conformation about the C=N double bond and intra-molecular C-H⋯S and N-H⋯N hydrogen bonds are observed in both mol-ecules. In the crystal, mol-ecules are linked by weak N-H⋯S hydrogen bonds with graph-set motif R 2 (2)(8). In each mol-ecule, all but one of the N atoms and both the S atoms are involved in hydrogen bonding.
authors.affiliation: Department of Chemistry, Xiamen University, Xiamen 361005, People's Republic of China.
authors.forename: Rui-Yun
authors.initials: RY
authors.lastname: Huang
authors.forename: Qin-Juan
authors.initials: QJ
authors.lastname: Xu
authors.forename: Li-Rong
authors.initials: LR
authors.lastname: Lin